Standard circular perforation R

Perforation	Perforation (board) %	Board dimensions		Furring channel b mm	Edge designs
Perforation	Perforation (board) %	Width mm	Length mm	Furring channel b mm	4 SK	FF/UFF	linear
6/18 R	8.7	1188	1998	333	•	•	-
8/18 R	15.5	1188	1998	333	•	•	•
10/23 R	14.8	1196	2001	333.5	•	•	•
12/25 R	18.1	1200	2000	333.3	•	•	•
15/30 R	19.6	1200	1980	330	•	•	-

Reference objects